GHCi runtime linker: fatal error: I found a duplicate definition for symbol
waitForProcess
whilst processing object file
/home/me/.cabal/lib/process-1.0.1.1/ghc-6.10.1/HSprocess-1.0.1.1.o
This could be caused by:
* Loading two different object files which export the same symbol
* Specifying the same object file twice on the GHCi command line
* An incorrect `package.conf' entry, causing some object to be
loaded twice.
GHCi cannot safely continue in this situation. Exiting now. Sorry.

Workaround: 2009-02-14: I don't know the proper solution to this yet, but I found that it helps to ghc --make Setup and then call ./Setup instead of runhaskell Setup

I get this error when I run GenI (wxHaskell 0.11 ; wxWidgets 2.8), and GenI refuses to load